EPEX (Korean: 이펙스; Japanese: イーペックス; short for Eight Apex) is an eight-member boy group under C9 Entertainment. They debuted on June 8, 2021 with their first EP Bipolar Pt.1 : Prelude of Anxiety. Their name is a combination of the words "eight" (8) and "apex" (peak). The meaning behind their name stands for "The gathering of eight youths reaches eight different zeniths", referencing the group's 8 members.
